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Finding the Fourth Proportional to 393,585.67, 543,145.45 and 223,819.75

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Solution

The fourth proportional to 393,585.67, 543,145.45 and 223,819.75 is: 308,869.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,585.67 : 543,145.45 = 223,819.75 : x
  2. Step 2: Convert to fraction form
    393,585.67/543,145.45 = 223,819.75/x
  3. Step 3: Cross multiply
    393,585.67x = 543,145.45 × 223,819.75
  4. Step 4: Simplify right side
    393,585.67x = 121,566,678,832.64
  5. Step 5: Solve for x
    x = 121,566,678,832.64/393,585.67
  6. Step 6: Final answer
    x = 308,869.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.